best operating system?

Best OS is linux , and best Mobile OS is Android.. come on.. A lot eyes seeing code? .. like Linux and Android.. more stable .)

Linux for me is better for programming using and mastering command prompt

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mac os is actually good. fast os and app ease of usage

I prefer Android, but its the only OS I've used in my life so maybe I don't help much

I prefer Mac/iOS . more pleasant to use. I guess I dont have to do a lot of technical stuff and mac is well designed overall.

Android, if you get the right phone, you basically have full control of it. But, with an Iphone there are a lot more restrictions on what you can do.
ps. Samsung X 8000+